Non-sour Starter?

I'd like to thank Debra Wink for taking the time to post the finer points of making an easy starter.

Now that I have been able to make sourdough at home, I would like to try other flavors using a starter. I plan to use other types of flour to get new flavors in the bread. I want to eliminate the sour flavor, if possible. Is there a flour ingredient that can be used to make a starter that doesn't taste sour?